Ingestion of solid or liquid substances into cell is referred to as

Options

A. Endocytosis
B. Diffusion
C. Osmosis
D. Exocytosis

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the process of ingestion of solid or liquid substances into a cell.

2. **Identifying the Options**: The options provided are:
- A) Endocytosis
- B) Diffusion
- C) Osmosis
- D) Exocytosis

3. **Analyzing Each Option**:
- **Option A: Endocytosis**: This is the process by which cells take in materials from the outside environment. It can involve solid particles (phagocytosis) or liquid particles (pinocytosis). Therefore, this option is relevant to the question.
- **Option B: Diffusion**: This refers to the movement of substances from an area of high concentration to an area of low concentration. It does not specifically involve ingestion into the cell, making this option incorrect.
- **Option C: Osmosis**: This is a specific type of diffusion that involves the movement of solvent molecules through a semi-permeable membrane. It does not pertain to the ingestion of substances into the cell, so this option is also incorrect.
- **Option D: Exocytosis**: This is the process where substances are expelled from the cell. Since the question is about ingestion, this option is not applicable.

4. **Conclusion**: The correct answer is **A) Endocytosis**, as it encompasses the ingestion of both solid and liquid substances into the cell.

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